115931387 has 16 divisors (see below), whose sum is σ = 137138400. Its totient is φ = 96614400.

The previous prime is 115931383. The next prime is 115931399. The reversal of 115931387 is 783139511.

It is a cyclic number.

It is not a de Polignac number, because 115931387 - 2² = 115931383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115931387.

It is not an unprimeable number, because it can be changed into a prime (115931383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18587 + ... + 24027.

It is an arithmetic number, because the mean of its divisors is an integer number (8571150).

Almost surely, 2^115931387 is an apocalyptic number.

115931387 is a deficient number, since it is larger than the sum of its proper divisors (21207013).

115931387 is a wasteful number, since it uses less digits than its factorization.

115931387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5614.

The product of its digits is 22680, while the sum is 38.

The square root of 115931387 is about 10767.1438645539. The cubic root of 115931387 is about 487.6037203811.

The spelling of 115931387 in words is "one hundred fifteen million, nine hundred thirty-one thousand, three hundred eighty-seven".